Modeling of adhesive bonding for multi-material design – MADBOND

Modeling of adhesive bonding for multi-material design – MADBOND

Project time: 2020 – 2023

The project will create a digital tool for solving the largest issue in multi-material design: the Δα-issue.

This project will enable a prediction tool to handle the largest obstacle for multi-material design: “the Δα-problem”. There is a large need for a flexible digital tool for prediction of deformations, adhesion, and fracture in adhesively bonded multi-material components and in manufacturing of epoxy-based composites. Adhesive bonding is a commonly used method for joining of multi-material components, often in combination with mechanical joining methods, such as friction elements or rivets. One large issue regarding adhesive bonding of multi-material components is the deformations caused by the different thermal expansion in the used materials. These deformations lead to poor adhesion, and in some cases also fracture, between the adhesive and the materials. Earlier work has shown that the amplitude of the deformation is dependent on several factors, such as the distance between fasteners, the thickness of the adhesive and the thicknesses of the materials. However, there is no available tool for prediction of the impact of the deformations on the adhesion. This project will develop a model for prediction of the deformations and their impact on the quality and fracture risk of the adhesively bonded joint. This will increase the possibility to design multi-material components in accordance with the light-weight strategy “right material at the right place” and thereby enable further reduction of component weight and increased safety and efficiency in design, production planning and manufacturing of new products.

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